Institution: | 1. Department of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan;2. Department of Physical Therapy, Takasaki University of Health and Welfare, Takasaki, Japan;3. Department of Orthopaedic Surgery, Maebashi Red Cross Hospital, Maebashi, Japan;4. Department of Orthopaedic Surgery, National Hospital Organization Takasaki General Medical Center, Takasaki, Japan |